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Acetic acid hydrogenation catalyst and its preparation method and application

A hydrogenation catalyst, acetic acid technology, applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve the problems of increased device load cost, large gas consumption, complicated processes, etc., and achieve high service life and cost. The effect of low and high catalytic activity

Active Publication Date: 2022-06-21
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method uses a multi-step impregnation method to load the above components on the carrier. The catalyst prepared by this method shows good activity and stability, but the process of this method is complicated, and each step of impregnation needs to be dried and roasted. The long-term treatment, and the hydro-acid ratio in the reaction process is relatively large, the space velocity is large, and the gas consumption is large, which increases the load cost of the device

Method used

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  • Acetic acid hydrogenation catalyst and its preparation method and application
  • Acetic acid hydrogenation catalyst and its preparation method and application
  • Acetic acid hydrogenation catalyst and its preparation method and application

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preparation example Construction

[0031] According to a second aspect of the present invention, the present invention provides a method for preparing the acetic acid hydrogenation catalyst, the method comprising: loading a soluble salt containing an active component and optionally a soluble salt containing a coagent on the modified catalyst On the carrier, solid-liquid separation, drying and calcination are carried out in sequence.

[0032] In the present invention, according to whether the acetic acid hydrogenation catalyst contains the active assistant and the first modification assistant, the preparation method can be specifically implemented in the following two ways.

Embodiment approach

[0033] When the acetic acid hydrogenation catalyst does not contain the coagent and the first modification aid, according to one embodiment, the method comprises the following steps:

[0034] 1) Preparation of modified carrier

[0035] In the presence of a kneading agent and a binder, kneading magnesia-aluminum spinel or magnesia-aluminum spinel precursor, the second modifying aid and the carrier into a shape, and then drying and calcining in sequence to obtain the modified sexual carrier;

[0036] 2) Load

[0037] The modified carrier is impregnated with an impregnation solution containing a soluble salt of the active component, followed by solid-liquid separation, drying and calcination in sequence.

[0038] When preparing the modified carrier, the kneading agent and the binder and their respective amounts can be selected with reference to the existing kneading method forming carrier technology. For the present invention, preferably, the kneading agent is selected from po...

Embodiment 1

[0087] This example is used to illustrate the acetic acid hydrogenation catalyst of the present invention and its preparation method.

[0088] S1: Add 49.39g of cobalt nitrate, 3.59g of sodium tungstate, 10.49g of 85% phosphoric acid, and 3.65g of potassium nitrate to 100mL of deionized water, continue stirring, and heat and dissolve at 120°C to obtain a Co-W-P-K mixed solution;

[0089] S2: Weigh 70g Al 2 O 3 and 10g MgO, mixed in a ball mill, ground for 2 hours, and then calcined at 1000 ° C for 8 hours to obtain magnesium aluminum spinel;

[0090] S3: 100g SiO 2 After the powder, 6g of succulent powder and 10g of S2 magnesia-aluminum spinel are mixed uniformly, poured into the kneader, slowly added the mixed solution of S1, kneaded and extruded into a 3mm*5mm rod shape, and dried at 120 ° C for 6 hours , and finally calcined at 600 °C for 4 hours to obtain a catalyst carrier;

[0091] S3: Add the catalyst carrier of S3 into 50 mL of ethylene glycol solution dissolved in...

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Abstract

The invention relates to the field of hydrogenation catalysts, and discloses an acetic acid hydrogenation catalyst as well as its preparation method and application. The hydrogenation catalyst includes a modified carrier and an active component supported on a modified carrier and an optional coagent; the modified carrier contains a carrier and a carrier modifier, and the carrier modifier includes magnesium aluminum spinel And an optional modification aid, the modification aid is selected from the first modification aid and / or the second modification aid, the first modification aid is selected from alkali metals, alkaline earth metals and rare earth metals and At least one of the respective oxides, and the second modification aid is at least one selected from alkali metal metasilicates and alkaline earth metal metasilicates. The acetic acid hydrogenation catalyst of the invention has higher catalyst activity, ethanol selectivity and stability in the reaction of acetic acid hydrogenation to ethanol.

Description

technical field [0001] The invention relates to the field of hydrogenation catalysts, in particular to an acetic acid hydrogenation catalyst and a preparation method and application thereof. Background technique [0002] Ethanol is an industrial fermentation product with the largest output and the longest history in industrial production. As an important basic chemical raw material, this product is widely used in chemical, military, pharmaceutical, food and other fields. At present, the production of fuel ethanol in my country mainly relies on grain fermentation and biomass routes. However, due to factors such as food security, "competing with others for grain", and declining policy subsidies, the grain fermentation method has gradually withdrawn from the field of ethanol production. The development of new raw materials and new processes to produce fuel ethanol, which partially replaces the process of using grain as raw materials, can not only protect my country's food secur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/188B01J27/19B01J35/10B01J23/62C07C29/149C07C31/08B01J21/10
CPCB01J27/188B01J23/626B01J27/19B01J35/1019C07C29/149B01J23/005B01J21/10C07C31/08
Inventor 龙俊英田树勋陈强张雪冰孟祥堃胡云剑程继红
Owner CHNA ENERGY INVESTMENT CORP LTD
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